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murzikaleks [220]
3 years ago
7

If 7 boxes of energy bars cost $6.75 more than 4 boxes of energy bars, how much does each box cost?

Mathematics
1 answer:
mel-nik [20]3 years ago
6 0
Well...
The difference between 7 and 4 is 3.
That difference cost $6.75.
Each box cost $6.75/3=$2.25

Good luck!
M.
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X^2+4x+y^2-10y+20=30 find the center of the circle by completing the square
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Answer:

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Step-by-step explanation:

Equation of the circle is,

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By comparing this equation with the standard equation of a circle,

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    Slope of the line joining this point to the center (-2, 5),

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          = \frac{5}{4}

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    Then by the property of perpendicular lines,

          m_{1}\times m_{2}=-1

          \frac{5}{4}\times m_{2}=-1

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   Now the equation of the line passing though (2, 10) having slope m_{2}=-\frac{4}{5}

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           y - 10 = -\frac{4}{5}(x-2)

           y - 10 = -\frac{4}{5}x+\frac{8}{5}

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Therefore, equation of the line will be, y = -\frac{4}{5}x+\frac{58}{5}

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